SRT files do look like that:
1
00:00:12,000 --> 00:00:15,123
This is the first subtitle
2
00:00:16,000 --> 00:00:18,000
Another subtitle demonstrating tags:
SUB files do look like that:
10:00:02.560,10:00:06.400
cercheremo di capire se lo squalo
bianco è un mangiatore di uomini.
10:00:08.080,10:00:10.240
Di ritorno alle acque
della zona degli squali,
10:00:10.400,10:00:13.560
i ragazzi hanno studiato un modo
per vedere se lo squalo bianco
If you got a finished movie, you should use a spotting app like SubBits or Belle Nuit, if you got your subtitles already in FCP you can use my TitleExchange to convert the subtitles to one of the formats.
Andreas
Spherico
https://www.spherico.com/filmtools